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entry status unconfirmedCockbain Events Ltd
Lôn Las Cymru Ultra
Next edition: Thursday, 14 October 2027 – Sunday, 17 October 2027Holyhead to Cardiff Bay, Wales
A virtually self-supported non-stop crossing from Holyhead to Cardiff on National Cycle Route 8 and the Taff Trail.
Official race site (opens in a new tab)
Optional device-only history; never synced to your account. Shared-device users can leave it off.
Distance250 mi
AscentUnknown
Climb / kmUnknown
Cutoff88h
Cutoff pace13:07/km
TechnicalityUnknown
Entry£280
FormatUnknown
Next edition
14 October 2027 – 17 October 2027
This is the most relevant confirmed edition currently held for the permanent race family. Edition-specific facts should still be checked against the final organiser instructions.
Edition archive
Expand an edition to inspect its year-specific facts. Other years never replace the primary edition facts.
Past editions
2025 to Past edition
These facts belong to the 2025 edition only. Missing values have not been copied from another year.
- Distance
- 402.34 km
- Ascent
- Not verified
- Cutoff
- 88h
- Entry
- £250
- Format
- continuous · single stage · point to point
- Stage layout
- Not applicable
Successful source check: 3 Sept 2026Source confidence: mediumOfficial results prove 15 finishers, while the official identity page and labelled secondary evidence together support the 16–19 October 2025, 250-mile, 88-hour and £250 facts. The 44-hour halfway control remains intermediate. Water was available at roughly 25-mile intervals and three checkpoints were indoors, so no false aid-station total is stored. A current Date TBA purchase and a conflicting 2035 homepage placeholder do not create a future edition.
Check Lôn Las Cymru Ultra 2025 source (opens in a new tab)
Race For You difficulty
7.4/ 10
Very hard
Limited input evidence · 10% evidence coverage
The main recorded demands are substantial race distance, accumulated fatigue and format burden. Course difficulty and cutoff pressure describe different challenges: more approachable terrain can still require a demanding pace to beat the deadline. Neither score assesses your personal fitness, safety or readiness.
Scoring details and version
Difficulty V2's separate time-limit modifier adds 0.00 points here and is capped at 0.70; a broad limit cannot erase extreme intrinsic demand. This is independent of the public Cutoff Pressure V2 band. Evidence coverage describes the recorded inputs, not prediction accuracy or your likelihood of finishing.
Weather, conditions and individual preparation can change the real difficulty significantly.
How the score works Distance, weighted 30 percent9.5 out of 10
Climbing, weighted 25 percent5.5 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent9.4 out of 10
Exposure & support, weighted 13 percent5.5 out of 10
Course analysis
What shapes this race
The course combines road, trail, mixed terrain.
roadtrailmixed
Cutoff analysis
Moderate pressure
To finish inside 88h, the raw average required is 13:07 per kilometre (21:07 per mile), including every stop.
Raw pace13:07/km
PressureModerate pressure
Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy. Raw pace includes checkpoints, food stops, navigation errors and any sleep; it is not a pacing plan.
Because ascent is not verified, Cutoff Pressure V2 uses the model's neutral 20m/km reference density. This assumption does not fill the ascent value or make missing evidence look easy.
Who this suits
First ultra?
There is not enough verified information to assess first-ultra suitability yet.
Exposure & kit
unknown kit
Night-running exposure has not been verified for this edition. Check the organiser’s latest schedule, route information and final kit rules.
Personal race predictor
Prediction unavailable
No current compatible predictor target is available for this family. The selected edition may be complete or cancelled, awaiting a successor, non-standard, or missing model-critical course evidence; older facts are not substituted.
Latest verification
Trust the source, see the gaps.
Data PartialOfficial next edition 14–17 October 2027, 250 miles Holyhead to Cardiff Bay, 88h limit and £280. Application requires a 100-mile finish and may be rejected by race director. Current inventory not verified from payment button; retain UNKNOWN. Only explicitly sourced new-edition facts are populated. Prior-edition route, price, entry status and participation details have not been inherited.
- Successful source check
- 28 Sept 2026
- Catalogue record updated
- 28 Sept 2026
- Official source
- Available
Still unverified: elevation.
Event details can change after a successful source check. Confirm the final route, kit, cutoff, price and entry terms directly with the organiser before entering or travelling.
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